Re: [Jack-Devel] JACK output via Bluetooth

On Tue, 18 Feb 2014, Paul Davis wrote:

> On Tue, Feb 18, 2014 at 3:59 PM, Holger Marzen <[hidden]> wrote:
> 
> >
> > 2.) zita-j2a
> >     It can't be run. It complains:
> >
> >     hm@wolke:~$ zita-j2a -v -p 128 -c 2 -d btphilips
> >     Alsa_pcmi: detected more than 1024 playback channnels, reset to 2.
> >     Alsa_pcmi: can't set playback period size to 128.
> >     Can't open ALSA playback device 'btphilips'.
> >
> 
> did you try changing the period size?

Yes. Same result. I can use the same period size as my jackd (256), I
can leave it blank or use another. The zita-doc says it want's a hw:
device. That's probably the source of the problem.

> also, your question is really not about how JACK can output to bluetooth,
> but about how to add an additional Bluetooth device to JACK for output when
> JACK is using some other device as the primary clock source.

It doesn't have to be an additional device. I'd be happy if my JACK
based programs could output to a bluetooth device, even if this would be
the only device that JACK is sending its output to.

So I tried the following simple .asoundrc:

ctl.btphilips {
    type bluetooth
}

pcm.btphilips {
    type bluetooth
    device "00:1D:DF:E4:59:B6"
    profile "auto"
}

And I tried to start jackd:

hm@wolke:~$ /usr/bin/jackd -t2000 -dalsa -r44100  -n2 -p1024 -Pbtphilips
jackdmp 1.9.8
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK server starting in realtime mode with priority 10
control device hw:0
audio_reservation_init
Acquire audio card Audio0
Acquire audio card Audio-1
creating alsa driver ... btphilips|-|1024|2|44100|0|0|nomon|swmeter|-|32bit
configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 6 periods for playback
ALSA: could not start playback (File descriptor in bad state)
Cannot start driver
JackServer::Start() failed with -1
Failed to start server
control device hw:0
Released audio card Audio0


It looks as if I am not far away from a working setup. But what's missing?

1392759121.14806_0.ltw:2,a <alpine.DEB.2.11.1402182206190.15842 at wolke dot intern dot marzen dot de>